| new host and locality records of coccidia (apicomplexa: eimeriidae) from rodents in the southwestern and western united states. | one hundred forty-seven murid and heteromyid rodents were collected from various sites in the southwestern and western united states (arizona, colorado, new mexico, texas, and utah) and baja california norte, mexico, and their feces were examined for coccidial parasites. of these, 53 (36%) were infected with at least 1 coccidian; 45 of 53 (85%) of the infected rodents harbored only 1 species of coccidian. infected rodents included: 10 of 22 (45%) neotoma albigula, 3 of 11 (27%) neotoma floridana ... | 1991 | 1779282 |
| discovery of an enzootic cycle of borrelia burgdorferi in neotoma mexicana and ixodes spinipalpis from northern colorado, an area where lyme disease is nonendemic. | an intensive enzootic cycle of borrelia burgdorferi was seen in populations of the mexican wood rat, neotoma mexicana, and ixodes spinipalpis ticks in northern colorado. cultures of rodent ear tissue and ticks yielded 63 spirochetal isolates: 38 n. mexicana, 2 peromyscus difficilis, and 23 i. spinipalpis. all 63 isolates were identified as b. burgdorferi sensu lato by polymerase chain reaction; a representative subset was characterized as b. burgdorferi by sds-page and immunoblotting. a tick-der ... | 1994 | 8077722 |
| culturing selects for specific genotypes of borrelia burgdorferi in an enzootic cycle in colorado. | in colorado, borrelia burgdorferi sensu stricto, the etiologic agent of lyme disease, is maintained in an enzootic cycle between ixodes spinipalpis ticks and neotoma mexicana rats (27). the frequencies of flagellin (fla), 66-kda protein (p66), and outer surface protein a (ospa) alleles were examined in 71 b. burgdorferi isolates from samples from colorado. approximately two-thirds of these samples were isolates from i. spinipalpis ticks that had been cultured in bsk-h medium prior to dna extract ... | 1997 | 9276416 |
| population genetics and phylogenetic analysis of colorado borrelia burgdorferi. | borrelia burgdorferi is transmitted in an enzootic cycle in colorado between the tick ixodes spinipalpis and the woodrat neotoma mexicana. the genetic relationship of colorado isolates to other b. burgdorferi isolates is unknown nor have relationships among various colorado isolates been determined. portions of the flagellin (fla), 66-kd protein, and outer surface protein a (ospa) genes were amplified from 71 colorado isolates, screened for genetic variability using single strand conformation po ... | 1999 | 10348251 |
| transmission of the agent of human granulocytic ehrlichiosis by ixodes spinipalpis ticks: evidence of an enzootic cycle of dual infection with borrelia burgdorferi in northern colorado. | previous work described an enzootic cycle of borrelia burgdorferi sensu lato (hereafter referred to as b. burgdorferi) maintained by the rodent neotoma mexicana and the tick ixodes spinipalpis in northern colorado. we investigated the incidence of coinfection among rodents with the agent of human granulocytic ehrlichiosis (aohge). aohge was detected in 23.5% of 119 rodent spleens examined. biopsy results indicated that 78 (65.5%) of the 119 rodents were positive for b. burgdorferi, whereas 22 (7 ... | 2000 | 10915099 |
| novel potential reservoirs for borrelia sp. and the agent of human granulocytic ehrlichiosis in colorado. | previous work demonstrated that ixodes spinipalpis ticks maintained an enzootic cycle of borrelia bissettii and the agent of human granulocytic ehrlichiosis (aohge) within woodrats (neotoma mexicana) and deer mice (peromyscus maniculatus) in northern colorado (usa). because i. spinipalpis is the only known vector of b. bissettii and aohge in colorado, this study was designed to determine the reservoir status of other hosts of i. spinipalpis in five distinct ecological zones along the front range ... | 2002 | 12038153 |
| diversity among tacaribe serocomplex viruses (family arenaviridae) naturally associated with the mexican woodrat (neotoma mexicana). | the results of analyses of glycoprotein precursor and nucleocapsid protein gene sequences indicated that an arenavirus isolated from a mexican woodrat (neotoma mexicana) captured in arizona is a strain of a novel species (proposed name skinner tank virus) and that arenaviruses isolated from mexican woodrats captured in colorado, new mexico, and utah are strains of whitewater arroyo virus or species phylogenetically closely related to whitewater arroyo virus. pairwise comparisons of glycoprotein ... | 2008 | 18304671 |